ส่ง email โดยใช้ SMTP Gmail แต่ติด error "Unable to read data from the transport connection: net_io_connectionclosed."

Dim SmtpServer As New SmtpClient()
            Dim myMail As New System.Net.Mail.MailMessage()
            SmtpServer.Credentials = New Net.NetworkCredential("[email protected]", "xxxxxxx")
            SmtpServer.Port = 465
            SmtpServer.Host = "smtp.gmail.com"
            SmtpServer.EnableSsl = True
            myMail.From = New System.Net.Mail.MailAddress("[email protected]")
            myMail.To.Add("[email protected]")
            myMail.Subject = "Account Username and Password"
            myMail.IsBodyHtml = True
            myMail.Body = "Username = " & dt.Rows(0)("Username").ToString & "" & _
            "<br> Password = " & dt.Rows(0)("Password").ToString()
            SmtpServer.UseDefaultCredentials = True
            SmtpServer.Send(myMail)
            myMail = Nothing
            MsgBox("Your password has been send to mail (" & dt.Rows(0)("Email").ToString() & ")")